DM74ALS574ASJ Equivalent & Substitute Parts

Part Overview

The DM74ALS574ASJ is a D-Type flip-flop logic integrated circuit featuring 1 element with 8-bit capacity, designed for positive edge triggering applications. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design requirements and production continuity. The part operates at 35 MHz clock frequency with tri-state, non-inverted outputs suitable for bus-oriented digital logic applications.

Key Parameters

Parameter	Value
Part Number	DM74ALS574ASJ
Manufacturer	onsemi
Series	74ALS
Function	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	35 MHz
Max Propagation Delay	14 ns @ 5V, 50pF
Trigger Type	Positive Edge
Current - Output High, Low	2.6 mA, 24 mA
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Iq)	18 mA
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DM74ALS574ASJ is determined by strict equivalence across the following critical parameters:

Logic Function: D-Type flip-flop with 1 element, 8-bit configuration
Output Characteristics: Tri-state, non-inverted outputs
Electrical Performance: 35 MHz clock frequency, 14 ns maximum propagation delay @ 5V, 50pF load
Trigger Mechanism: Positive edge triggering
Power Supply: 4.5V ~ 5.5V operating range
Output Drive Capability: 2.6 mA (high), 24 mA (low)
Quiescent Current: 18 mA
Temperature Range: 0°C ~ 70°C
Mounting: Surface mount technology
Package Footprint: 20-SOIC form factor

Substitute parts must maintain identical electrical specifications and functional behavior. Package width variations are noted where they occur, as physical dimensions may affect PCB layout compatibility.

Parameter Comparison

Parameter	DM74ALS574ASJ (onsemi)	SN74ALS574BNSR (TI)	SN74ALS574BDW (TI)	SN74ALS574BDWR (TI)
Series	74ALS	74ALS	74ALS	74ALS
Function	D-Type Flip Flop	D-Type Flip Flop	D-Type Flip Flop	D-Type Flip Flop
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Clock Frequency	35 MHz	35 MHz	35 MHz	35 MHz
Max Propagation Delay @ 5V, 50pF	14 ns	14 ns	14 ns	14 ns
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Current - Output High, Low	2.6 mA, 24 mA	2.6 mA, 24 mA	2.6 mA, 24 mA	2.6 mA, 24 mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Iq)	18 mA	18 mA	18 mA	18 mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete	Active	Last Time Buy	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74ALS574BNSR (Texas Instruments) is the primary substitute for the DM74ALS574ASJ. This part maintains identical electrical specifications and package dimensions (20-SOIC, 0.209" width), ensuring direct compatibility with existing PCB layouts. The part carries Active product status and ROHS3 compliance, supporting long-term design continuity and regulatory requirements.

SN74ALS574BDWR (Texas Instruments) provides an alternative substitute with Active product status and ROHS3 compliance. This part features a wider 20-SOIC package (0.295" width) compared to the original specification. Physical package dimensions differ, requiring PCB layout verification before implementation.

SN74ALS574BDW (Texas Instruments) is available as a Last Time Buy option. While electrically equivalent, this product status indicates limited future availability. The part also features the wider 20-SOIC package (0.295" width), requiring layout consideration.

All substitute parts maintain REACH Unaffected status and MSL 1 rating, consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS574BNSR directly replace DM74ALS574ASJ without PCB modifications?

A: Yes. SN74ALS574BNSR maintains identical electrical specifications and package footprint (20-SOIC, 0.209" width), enabling direct substitution without PCB layout changes.

Q: What is the difference between SN74ALS574BNSR and SN74ALS574BDWR?

A: Both parts are electrically equivalent with identical functional specifications. The primary difference is package width: SN74ALS574BNSR uses 0.209" width, while SN74ALS574BDWR uses 0.295" width. This physical dimension difference may affect PCB compatibility depending on layout constraints.

Q: Why does SN74ALS574BDW show Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this part number. While currently available, future procurement may become limited. SN74ALS574BNSR or SN74ALS574BDWR are recommended for new designs requiring long-term availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74ALS574BNSR, SN74ALS574BDW, SN74ALS574BDWR) carry ROHS3 compliance certification. The original DM74ALS574ASJ RoHS status was not specified in available documentation.

Q: Do package width variations affect electrical performance?

A: No. Package width variations (0.209" versus 0.295") do not affect electrical characteristics or functional behavior. Differences are purely physical and may impact PCB layout routing and component placement.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling, simplifying inventory management and logistics.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message